360 APOCYNACE^. (DOGBANE FAMILY.) 



of the stamens, bell-shaped, scarcely longer than the ovate spreading lobes ; 

 anthers tapering into a long bristle-like awn ; glands of the nectary 5, rounded, 

 as long as the ovaries. (E. suberecta, Andr. Neriandra suberecta, A. DC.) 

 Sandy shores, South Florida. Stem 1 - 2 high. Leaves 1 '- 2' long. Tube 

 of the corolla 1' long, ' wide. 



4. AMSONIA, Walt. 



Calyx small, 5-parted. Corolla funnel-form, 5-lobed, bearded within. Sta- 

 mens inserted above the middle of the tube : anthers oblong, obtuse. Stigma 

 globose, surrounded by a cup-shaped membrane. Follicles slender. Seeds in a 

 single row, terete, truncated at each end, naked. Erect branching perennial 

 herbs, with alternate leaves, and small pale blue flowers in a terminal panicle. 



1. A. Tabernaemontana, Walt. Stem smooth, branching above ; leaves 

 ovate, ovate-lanceolate, or lanceolate, acute or acuminate at each end, glaucous 

 beneath, short-petioled ; tube of the corolla slender, smooth, or woolly above, 

 many times longer than the minute calyx ; follicles spreading. (A. latifolia, 

 Michx. A. salicifolia, Pursh.) Swamps and wet banks, Florida to Mississippi, 

 and northward. May and June. Stem 2 high. Leaves l'-4' long, often 

 slightly pubescent beneath. Panicle open or contracted. Follicles 4' -6' long. 



2. A. ciliata, Walt. Stem hairy, at length much branched above ; leaves 

 very numerous, linear or linear-lanceolate, acute at each end, fringed on the 

 margins ; corolla smooth. Dry sandy soil, Florida to North Carolina. April 

 and May. Stem at length 2 -3 high. Leaves l'-2' long. Corolla pale 

 blue or white. Follicles more slender than those of the preceding. 



5. VINCA, L. PERIWINKLE. 



Calyx 5-parted. Corolla salver-form, 5-lobed, thickened or angular at the 

 throat, the narrow tube hairy within. Anthers oblong, longer than the filaments. 

 Glands 2, alternating with the ovaries. Style slender : stigma thick, with an 

 inverted cup-shaped membrane at the base. Follicles 2, linear, erect. Seeds 

 oblong, rough, naked. Herbs or shrubby plants, with opposite short-petioled 

 leaves, and axillary mostly solitary showy flowers. 



1. V. rosea, L. Shrubby, pubescent; stem erect, branching; leaves ob- 

 long, rounded at the apex, mucronate ; flowers solitary or by pairs, nearly 

 sessile ; lobes of the corolla white or pale rose-color, obliquely obovate, mucro- 

 nate, shorter than the downy tube ; a row of hairs at the throat and another on 

 the tube below. South Florida, and in the streets of Apalachicola, probably 

 introduced. Flowering through the summer. 



6. VALLESIA, Ruiz and Pavon. 



Calyx 5-parted. Corolla salver-shaped, 5-lobed. Stamens inserted on the 

 throat of the corolla : anthers cordate-ovate, longer than the slender filaments. 

 Nectary none. Ovaries 4-ovuled. Stigma club-shaped. Drupe mostly solitary, 



